HDMI Sleep

Hi All.I've had my Pi for a while now & am using it for all sorts of things. I'm a bit of a Linux noob though.I use my Pi mostly for services (DNS, VPN endpoint, proxy, etc) so it is on all the time. But I given it it's own little HDMI monitor & keyboard next to my main PC for when I do want to do something on the Pi directly. The one thing that has been vexing me for a while now is that the Pi will sleep by making the screen go blank but it will not put the monitor to sleep/suspend. The backlight stays on so when I come into my office at night there's always this glow (read: wasted energy) from the monitor. Mostly it stays in terminal mode but it can be in X sometimes, but the sleep states are the same.

Is there a way to fix this? How to I play with the power management settings for the HDMI/display?

Nobody seem to understand the real problem: There should be a way to set the monitor in sleep mode automatically, instead of just blanking the screen. All my other Computers do this (Linux and Windows).It's simpy a question of saving power.